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OXYLANE VILLAGE, DECATHLON UK
NOTTINGHAM
ARBORICULTURAL IMPLICATIONS ASSESSMENT
(Report Ref: TEP.2953.001)
September 2013
Version 3.0
for
Decathlon UK
Canada Water Retail
Surrey Quays Road
London
SE16 2XU
Written: Checked: Approved:
TP RO JS
OXYLANE VILLAGE, DECATHLON - NOTTINGHAM
ARBORICULTURAL IMPLICATIONS ASSESSMENT
CONTENTS PAGE
1.0 INTRODUCTION ....................................................................................... 1
2.0 THE SITE AND SURROUNDINGS ................................................................. 2
3.0 TREE PRESERVATION ORDERS AND OTHER STATUTORY PROTECTION .......... 3
4.0 TREE POPULATION & DEVELOPMENT IMPLICATIONS ................................... 5
5.0 TREE PROTECTION REQUIREMENTS ......................................................... 10
6.0 ARBORICULTURAL RECOMMENDATIONS .................................................. 11
7.0 SUMMARY ............................................................................................ 15
APPENDICES
Appendix 1: Arboricultural Data Sheets
Appendix 2: Survey Method
DRAWINGS
Drawing 1: Tree Constraints Plan: D2953.001
Drawing 2: Arboricultural Implications and Tree Protection Plan: D2953.003B
Drawing 3: Tree Protection Fencing: D.TREE_FENCING.001
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
Version 3.0
1 September 2013
1.0 INTRODUCTION
1.1 TEP has been commissioned by Decathlon UK to conduct an arboricultural
survey of land adjacent to M1 Junction 26. This report details the arboricultural
implications of developing the site, subsequent mitigation recommendations and
protective measures.
1.2 The survey was carried out in June 2011 by means of inspection from ground
level by a qualified arboriculturist. Weather conditions during the survey were
fine.
1.3 Under BS 5837:2005 Trees in Relation to Construction - Recommendations the
assessment of trees is made objectively. The categorisation method identifies
the quality and value of the existing tree stock.
1.4 A topographical survey drawing detailing tree stem/canopy outline locations
(Ref: 110614-M1_J26_A610) was used to record the position of existing trees
and vegetation. For the purposes of this report we have assumed that detail on
the drawing is accurate. A number of trees were not shown on the
topographical survey drawing, particularly those within the peripheral woodland
compartments and on the site boundary. The location of all such trees on
Drawing 1 is approximate.
1.5 A total of 33 individual trees (T1 – T33); 12 groups of trees (G1 – G12) and 6
woodland groups (W1 – W6) were surveyed and mapped (refer to Drawing 1).
All arboricultural information recorded during the survey is presented at
Appendix 1.
1.6 The nature of the soils on site was not assessed during the survey. The
possibility of minor soil movement due to tree root activity cannot be discounted.
The advice of a structural engineer should be sought in regard to appropriate
foundation depths.
1.7 This report provides the results of the survey and includes the following:
A schedule of all trees located within, or in close proximity to the
proposed development site (Appendix 1);
An assessment based on BS 5837:2005, of trees in terms of their
potential value within any future development. On the basis of this
assessment trees have been categorised into one of four categories: A, B,
C or R (Appendices 1 & 2);
An assessment, based on BS 5837:2005, of the requirement for
protection of trees during the construction phase (Section 5);
Advice on removal, retention and management of trees (Sections 4 & 6);
A Tree Constraints Plan detailing tree quality categories, canopy spreads
and Root Protection Areas (RPA) for all trees surveyed (Drawing 1);
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
Version 3.0
2 September 2013
A Tree Implications and Protection Plan detailing the development
proposals, trees to be retained and removed, tree protection fencing and
special mitigation construction (Drawing 2).
2.0 THE SITE AND SURROUNDINGS
2.1 The site is located to the west of Nottingham, adjacent to the M1 motorway
and the A610 and close to Nuthall. The survey area itself is a large field to the
west of the motorway and south of the A610 and is accessed from the north.
2.2 The land topography is gently sloping from south west to north east with
steeper localised level changes at the northern boundary and around the existing
agricultural access point. It comprises grazed agricultural land with woodland
belts and hedgerow around most of the boundary.
2.3 The site lies within the Green Belt and within the Greenwood Community
Forest.
2.4 It is presumed for the purposes of this report that the ownership boundary is
defined by the fence and associated trees that surround much of the site. It
may be that the boundary lies further out in some areas and that the
requirements of the agricultural usage of the site have dictated the fence
location. In such cases, trees that have been noted as ‘third-party’ may in fact
fall under the ownership and responsibility of the site owners and managers. All
trees directly on the boundary may be presumed to be jointly owned by both
landowners.
Development Proposals
2.5 The proposed development is a retail and leisure facility. The scheme comprises
shops, sports pitches, cycle tracks and amenity landscaping as well as car
parking and supporting infrastructure.
2.6 A key element of the project will be the augmentation and enhancement of the
existing green infrastructure and the creation of new habitats and access to
amenity landscapes. In particular, a new track for cycling/recreation will be
created around the perimeter of the site, which will abut the existing woodland
to the north and provide opportunities for additional planting.
2.7 The detail of the proposals is shown on Drawing 2 and is based on the Site Plan
(Ref: Broxtowe SitePlan updated aug13v04) supplied by the client.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
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3 September 2013
3.0 STATUTORY DESIGNATIONS AND PLANNING FRAMEWORK
Tree Preservation Orders
3.1 Consultation with Broxtowe Borough Council confirmed that at the time of the
survey a number of trees were subject to Tree Preservation Order status. The
woodland belt to the north-west of the site (including G4, T1, T2 and northern
part of W1) is protected. This area is called Verge Wood.
3.2 No works to these trees may be undertaken without written permission from the
local authority.
Conservation Area
3.3 The site is not within a Conservation Area. Nuthall Conservation Area lies to the
north of the A610 and any intention to undertake tree works within this area
(particularly around the access road construction) must be notified to the local
authority six weeks in advance of the commencement of works. The local
authority may make a Tree Preservation Order during this time if they consider it
expedient to do so. 3.4 (Policy E3) - Planning permission will only be granted for development within a
conservation area which preserves or enhances the character and appearance of
the area having regard to its location, scale, design and materials.
Green Belt
3.5 The site is within the Green Belt. As such, a number of local planning policies
may be considered pertinent to the management of trees within the development.
There is therein a clear planning requirement to preserve and enhance visual
amenity and conservation value, both of which may be delivered substantially
through new tree planting.
3.6 (Policy E8) - Planning permission will not be granted for development in the Green
Belt except where it constitutes appropriate development. Appropriate
development includes: essential facilities for outdoor sport and outdoor
recreation; essential facilities for other uses of land which preserve the openness
of the Green Belt and which do not conflict with the purposes of including land
within it.
3.7 (Policy E9) - Development in the Green Belt will not be permitted if the
development, by reason of its siting, design or materials, harms the open
character or visual amenities of the Green Belt.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
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3.8 (Policy E10) - Within the context set by policies E8 and E9, planning permission
will be granted for uses of land in the Green Belt which provide opportunities for
access to the open countryside, or for outdoor sport and recreation, and retain or
enhance the attractiveness of landscapes and secure nature conservation
interests. Felling Licences
3.9 If over 5m3 of timber is to be removed within a calendar quarter from any
woodland there is a requirement, under Forestry Acts 1967 and 1979, to obtain
a Felling Licence from the Forestry Commission. An assessment of the quantity
of timber to be felled at any one time should be made on determining the final
details of the works to be carried out. 3.10 A felling licence is not required for felling to immediately facilitate a development
authorised by a planning permission.
3.11 Other general exemptions that remove the need for a felling licence include:
Where the trees to be felled are less than 80mm dbh (diameter at breast
height) or 150mm dbh for coppice or under-wood, or 100mm dbh for
thinnings;
Where the felling of a tree is required to abate a foreseeable hazard or
danger;
Where trees are to be felled as part of a Woodland Grant Scheme (WGS)
contract entered into between the landowner and The Forestry
Commission.
3.12 A felling licence may be required as part of any subsequent woodland
management works that may be enforced as a condition of planning or as part
of ongoing improvements.
Protected Species
3.13 Mature trees often contain cavities, crevices and hollows that offer potential
habitat for species such as bats and birds. Both are afforded protection under
the Schedule 1 and 5 of the Wildlife and Countryside Act 1981 (as amended),
as well as under Schedule 2 of the Conservation (Natural Habitats) Regulations
1994 (as amended).
3.14 A preliminary ground level appraisal of the wildlife habitat value of each feature
was undertaken as part of the arboricultural survey. Due to their age and
condition 10 features were found to have features of a size and condition
desirable to bats and/or owls. Table 1 provides details of trees with these
features.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
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Table 1: Trees on site with bat potential
Feature number Feature of bat potential
T1 Cracks
T8 Stem failure
T11 Cavities
T16 Previous branch failures
G4 Dense group
W1 Woodland
W2 Woodland
W3 Woodland
W4 Woodland
W5 Woodland
3.15 If the presence of a bat roost is suspected whilst undertaking any works on trees
and groups on site, operations must be halted until a licensed bat handler or
ecologist can provide advice.
3.16 Nesting birds, their nests and eggs are protected under the Wildlife and
Countryside Act 1981 (as amended). It is an offence to intentionally or
recklessly, damage or destroy nests and all tree work should ideally be
undertaken outside the bird nesting season (March to August inclusive).
3.17 If this is not possible then a detailed inspection of each tree should be undertaken
by a qualified ecologist immediately prior to the arboricultural works. Should an
active nest be found (being built, containing eggs or chicks) then any work likely
to affect the nest must be halted until the nest becomes inactive.
4.0 TREE POPULATION & DEVELOPMENT IMPLICATIONS
Population
4.1 33 trees, 12 groups and 6 woodland compartments were surveyed. A schedule
of their species, condition, age, BS 5837:2005 quality value and management
recommendations is provided at Appendix 1.
4.2 Surveyed trees are mainly confined to the perimeter of the survey area and are on
the site boundary or on adjacent third-party land. A line of trees runs down the
centre of the site and is presumed to indicate a previous boundary.
4.3 The woodland area to the north-west of the site is called Verge Wood.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
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4.4 The survey includes a high proportion of high value (A Category) features. This is
largely due to the landscape and habitat significance of the woodland belts
flanking the site. These are prominent within the landscape and form part of a
larger wood that previously connected with woodland to the north before it was
bisected by the A610.
4.5 The perimeter woodlands and groups are in good condition but would benefit
from some thinning to improve age structure and species mix. The dominant
species in all woodland groups are sycamore, ash, beech and hawthorn.
4.6 The woodland compartments contain a number of dead elm trees that could fall
into the site.
4.7 Most woodland compartments are delineated at the boundary by ‘boundary
trees’. These tend to be different to the surrounding woodland by virtue of form,
species and uniformity. In many places, these trees comprise lapsed mature
hawthorn hedgerow.
4.8 Group G1 is an old boundary feature that combines with group G2 to form a
short section of ‘Green Lane’. The topography and form of the trees in G1
suggest that the orientation of the feature predates the surrounding plantation,
giving it additional historic interest.
4.9 Trees T13 to T31 and groups G11 and G12 are evidence of a previous boundary
between the two halves of the site. They roughly bisect the site from north to
south. Most trees in this area are suffering from soil compaction caused by cattle
grazing and some associated stem wounding. Accordingly, five trees in this
grouping have been given an R Category denoting unsuitability for retention due
to poor condition. As a grouping, these trees are significant within the landscape
because they are visible from the motorway and provide evidence of previous site
usage. Many of the trees in the area would benefit from soil decompaction or
mulching to improve the rooting environment.
4.10 Tree and group locations, their quality categories and canopy spreads are shown
on Drawing 1.
Tree Quality Categorisation
4.11 Under BS 5837:2005 Trees in Relation to Construction – Recommendations trees
and groups are objectively assigned a quality category designed to quantify their
value within any future development. Table 2 presents a summary of the
categorisation criteria presented in ‘Table 1 – Cascade chart for tree quality
assessment’ of the British Standard. The full table has been reproduced at
Appendix 2.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
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Table 2: BS 5837:2005 tree quality categories
Category A Trees of high value including those that are particularly good
examples of their species and/or those that are visually dominant
within the landscape
Category B Trees of moderate value including those that do not qualify as
Category A due to minor remedial defects and/or those that
collectively form distinct landscape features, thereby attracting a
higher rating than they might as individuals
Category C Trees of low value, the retention of which should not
unreasonably constrain development
Category R Trees unsuitable for long-term retention that should ideally be
removed prior to the commencement of construction unless
otherwise advised
Implications of the Proposed Development
4.12 Table 3 lists the BS 5837:2005 quality categories of trees that will require
removal in order to facilitate the development proposals and those that can be
retained. This is the result of an assessment based on the proposed site plan
supplied by the client.
Table 3: Arboricultural implications of the proposed development
Tree Quality Assessment Category/Retention Value
A B C R
Trees and groups that
can be retained
T4, T7, T10,
T11, T12,
T15
G2 (partial)
G6, G9
W1, W2, W3,
W4, W5, W6
T2, T3, T5, T6,
T8, T9, T13,
T14, T16, T18,
T19, T20, T21
G1 (partial),
G4, G5,
G10 (partial),
G11, G12
T1, T30, T33
G7, G8, -
Trees and groups that
require removal to
facilitate development
T28
G2 (partial)
T23, T24, T26,
T29, T31
G1 (partial),
G10 (partial)
G3
T17*, T22*,
T25, T27,
T32
See Appendix 1, Arboricultural Data Sheets for subcategories
*Trees recommended for Conservation Stump creation
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
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4.13 11 trees will require removal and 4 groups will require partial or total removal to
facilitate the development proposals.
4.14 The total reduction in tree cover by canopy area that is required to facilitate the
development is approximately 0.3ha.
4.15 Trees T17, T22, T25, T27 and T32 are R Category under the British Standard
(unsuitable for long term retention). These trees are either recommended for
complete removal or for conversion to standing deadwood habitat because of
poor condition. However, they are all counted towards the total number of
removed trees because they could be retained as they are under the current
land usage.
4.16 Trees T17 and T22 are dead and should be reduced so that the stem or stem
and primary scaffold branches remain. The purpose of this is to leave dead
wood habitats and retain visually interesting features within the development.
4.17 The impact of the required tree removal will be mainly visual and in terms of
habitat and connectivity. The existing but broken belt of trees that bisects the
site and suggests a previous field boundary will be substantially removed. One
high-value tree (T26) will be removed), as will some trees from high-value group
G2.
4.18 The most significant tree loss will be associated with the access road and
required visibility splays. Construction in this area will result in the loss of a
large part of group G2 (high value), a significant part of groups G1 and G10
(moderate value) and all of G3 (low value). Together, these features provide an
effectively continuous green corridor along the southern side of the A610 to the
benefit of visual amenity, landscape character, screening for the houses to the
north and habitat infrastructure.
Mitigation Landscaping
4.19 Mitigation for the loss of trees and associated habitats will be provided in the
form of replacement tree planting. A planting masterplan has been produced
and is shown on Drawing 2. This plan forms the basis of the assessment of net
or residual arboricultural impacts.
4.20 The choice of replacement trees includes species of varied ultimate size and
height, incorporating larger tree species with the potential to provide benefit
beyond their immediate environment and to a more diverse range of ecology
(oak, small leaved lime, sweet chestnut, beech, and hornbeam). Small and
medium sized native trees are also specified (crab apple, field maple, rowan and
bird cherry).
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
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4.21 The surrounding belts of woodland present a significant opportunity for
arboricultural improvement of the area, both through thinning and planting
within the woods and by augmentation through adjacent planting. To this end,
liaison with neighbouring landowners is recommended in order to negotiate
possible areas for the recommended woodland improvement works. Any such
works may require TPO permission or Felling Licences.
4.22 The loss of screening and wildlife corridor effects associated with the removal
of trees in groups G1, G2, G3 and G10 will be mitigated by the planting of new
pockets of woodland around the new entrance road. The planting of land
adjacent to the new entrance will have the effect of increasing the depth of
boundary vegetation. Views through the entrance gap will largely be obscured
by trees within the site but lining the mouth of the site entrance. Accordingly,
the visual impact of the gap in the otherwise unbroken buffer will be
diminished. Views into the site through the entrance will be possible along an
approximately 175m length of the road.
4.23 The loss of individual trees across the site can be mitigated by the planting of
new specimen trees within the site landscaping scheme. Trees T22 to T29 and
T31 include large Oaks that mark a boundary line within the site that is no
longer present. One new specimen tree is proposed on this original line in the
centre of a new roundabout.
4.24 Three specimen trees will be provided around the road infrastructure at the site
entrance. These will provide visual interest and an arboricultural focal point to
introduce the green character of the site. Tulip tree, redwood and sweet
chestnut have been specified.
4.25 150 individual trees will be planted in total (excluding woodland planting) as
part of the site’s landscaping scheme. This represents a significant increase in
arboricultural amenity and value. The increase in tree numbers and structural
diversity of the stock will improve the long term prospects for tree cover, health
and associated social, environmental and economic benefits.
4.26 The new area of woodland planting that is shown in the west of the site will
have a significantly beneficial effect on the arboricultural value of the site. The
benefits that are associated with new woodland planting will increase over time
and may not reach a final plateau for hundreds of years.
4.27 New woodland planting comprises individually small trees that contribute little
to visual amenity of habitat value in the short term. However, the total area
available for new planting is larger than the total area of removed trees. Over
time, there will therefore be potential for a significant net increase in the
arboricultural value of the site under the proposed scheme where a suitably
robust landscaping scheme can be agreed.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
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4.28 New woodland planting to extend Verge Wood and to strengthen the boundary
planting in the southern part of the site is proposed. In total, 5.88ha of new
woodland planting is proposed. This area will include a cycle/recreational
pathway for public use. This proposal represents a meaningful contribution to
local tree cover that will ensure that, with appropriate management, the
arboricultural legacy of the development is strongly positive.
4.29 In addition to tree planting, 13,865m2 of native shrub planting and 13,120m2 of
wildflower meadow is proposed. These will provide benefits beyond the scope
of this report but new native vegetation and associated increases in habitats
and fauna should be considered to be mutually beneficial for trees. Woodland
development and function in particular will be improved by the nearby presence
of other native flora.
5.0 TREE PROTECTION REQUIREMENTS
Root Protection Areas (RPAs) and Construction Exclusion Zones (CEZ)
5.1 As per BS 5837:2005, the RPA is calculated using the trees diameter at 1.5
metres (refer to Appendix 1) and represents the minimum area around each tree
that must be left undisturbed to ensure their survival.
5.2 Tree roots spread two to five times the width of the crown. The majority of tree
roots are found in the top 600 mm of soil and most of the fine roots that absorb
water and nutrients are found in the top 100 mm.
5.3 The morphology of roots is influenced by past and present site conditions (the
presence of roads, structures and underground services), soil type, topography
and drainage. This means that a tree’s roots may not be uniform in their extent
and the RPA may not be a circular area centred on the tree stem.
5.4 The RPAs shown on Drawing 1 are indicative only at this stage and has been
used to inform the placement of protective fencing (Drawing 2). This defines a
Construction Exclusion Zone (CEZ) which must be considered sacrosanct during
all development phases.
Protective Fencing
5.5 Protective barrier fencing will be required to demarcate a CEZ around retained
trees in close proximity to proposed construction. This must be done prior to the
commencement of any development works, including bringing machinery or
materials onto site and the erection of site huts. Protective fencing alignment is
shown on Drawing 2 and assumes that all trees identified for removal have been
felled prior to installation.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
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5.6 The fencing must be fixed into the ground to withstand accidental impact from
machinery and to ensure that a sufficient protective area is maintained. Details of
the recommended Heras protective fencing are shown in Drawing 3.
5.7 Any alteration to the fencing alignment to allow for approved activities will be
made in agreement with the Council’s Arboricultural Officer.
5.8 The protective fencing must not be removed until the physical construction phase
has been completed and all vehicles have been removed from site, to the
satisfaction of the appointed Arboricultural Consultant.
Ground Contamination
5.9 Storage areas for liquids such as fuels, oil or paint should not be located within
10m of any trees on or within proximity the site due to the risk of soil
contamination caused by accidental spillage.
5.10 If contamination does occur, then remediation advice should be sought from a
qualified arboriculturist.
Underground Utility Issues
5.11 Guidelines set out in the National Joint Utilities Group publication NJUG Volume
4, Guidelines for the Planning, Installation and Maintenance of Utility apparatus
in Proximity to Trees will be adhered to during excavation works close to or
partially within RPAs.
5.12 NJUG Volume 4 can be downloaded free of charge from –
http://www.njug.org.uk
Tree activity and high ropes play area
5.13 The proposed installation of a play area around trees T13 to T21 and groups
G11 and G12 will require special protection during construction and also during
final site usage. These measures should be outlined in an Arboricultural Method
Statement. The design of the facility must be informed by detailed
arboricultural recommendations covering form, installation and future
management.
6.0 ARBORICULTURAL RECOMMENDATIONS
Tree works
6.1 The following recommendations are made for the abatement of existing or
developing hazards and in the interests of good arboricultural management.
Some opportunities to improve the tree stock are also highlighted.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
TEP Report Ref: 2953.001
Version 3.0
12 September 2013
Table 4: Tree works
Tree or Group Reference
Number Works Required
T1* Monitor condition biennially and pollard on 5-year cycle
T3, T9 Monitor annually
T11 Remove dead wood and clear out stem union for reinspection
T14 Remove dead branch and crown lift
T15 Remove dead branch
T16 Remove low branch
T17, T22 Reduce to a single stem ‘conservation stump’ and monitor
annually
T21 Deadwood
T25, T27, T32 Remove tree and replant
T30 Deadwood, mulch area and monitor recovery
T33 Monitor annually
G1 Remove part to facilitate construction. Interplant to reinforce
and restore feature and crown lift over green lane
G2 Remove part to facilitate construction. New planting to
improve species mix/age structure. 15% selective thin.
G3 Remove to facilitate construction
G4* Remove dead trees within falling distance of the site
G7 Infill and new planting to improve wildlife corridor connecting
new swale to existing woodland and improve screening
G9 Infill planting and new planting to extend group to the south
G10 Remove part to facilitate construction
W1*
Improve species and age mix by new planting as selective
thinning, inspect boundary trees biennially, install protective
fencing 7m from stems during construction
W2
Selective thinning around potential climax trees to facilitate
species transition, remove one hawthorn with union failure,
install protective fencing 4m from boundary
W4 Remove dead elms and hawthorn near to boundary
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
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13 September 2013
Tree or Group Reference
Number Works Required
W5 Clear up failed ash tree and fell supporting tree with rootplate
instability
W6 Remove dead and dying elms along boundary and extend
group by new planting along the boundary to the north
T13, T14, T15, T16, T18,
T19, T20, T21, G11, G12
Additional pruning and installation works may be required
during installation of play facility, particularly crown lifting
and mulching to alleviate cattle compaction. Works to be
detailed as part of an Arboricultural Method Statement
*Marked features are subject to Tree Preservation Order and recommended works will
require permission from the local authority.
6.2 The removal of dead wood and dead trees for risk management purposes
constitutes a loss of niche habitats across the site. To this end, the retention of
dead trees as ‘conservation stumps’ is recommended as well as the retention of
all dead trees within the peripheral woodland compartments that are beyond
falling distance of any target.
6.3 The installation of play logs may provide deadwood habitat as well as meeting
recreational objectives and recycling trees felled on the site.
Arboricultural Method Statements
6.4 The construction activities proposed within the CEZ identified on Drawing 2 will
require an Arboricultural Method Statement (AMS).
6.5 An AMS details special mitigation construction and procedures that will minimise
damage to tree roots and the surrounding soil. Special mitigation construction
works are likely to require more time and proprietary materials, thus early
consultation and discussion with an appropriately qualified arboriculturalist when
detailing plans will help with resource allocation.
6.6 The installation of a play area around trees T13 – T21 and groups G11 and G12
will require a method statement to detail tree protection methods during and
post-construction. It may be possible to use existing trees within the apparatus
design, for example to support platforms or framework. This must be informed
by an AMS and an appropriate system of tree risk management. Trees in this
area should be resurveyed individually following the construction phase to ensure
safe operation of the facility.
6.7 Trees T23 and T28 are retained within areas of hard landscaping in the scheme.
The successful retention of these trees will be technically possible using special
construction techniques that must be detailed in an AMS. Detailed
recommendations for the construction of six overflow parking spaces within the
rooting area of T28 should also be included.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
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6.8 Trees T24, T26 and T30 are retained within soft landscaping areas in the
scheme. Surface treatment, planting and other associated activities in these
areas should also be detailed within an AMS.
6.9 Some sections of footpath and cycle path pass close to trees. These should be
detailed in an AMS in order to avoid damage to tree roots and soils.
Post Development Management
6.10 Aftercare is vital to the survival of newly planted trees. Provision should be
made for the maintenance of newly planted trees and include watering,
formative pruning and the checking of tree ties and stakes.
6.11 Hazard recommendations are based on observations at the time of survey.
Trees are dynamic living organisms whose structure is constantly changing.
Even those in good condition can suffer from damage or stress. Following site
development, regular (annual or biennial) inspections of all retained trees should
be undertaken by a qualified arboriculturist.
Oxylane Village, Decathlon - Nottingham – Arboricultural Implications Assessment
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Version 3.0
15 September 2013
7.0 SUMMARY
7.1 Based on an objective assessment made in accordance with BS 5837:2005
Trees in Relation to Construction – Recommendations, there are 16 Category A
features, 24 Category B features, 6 Category C features and 5 Category R
features within the survey area.
7.2 11 trees, 1 tree group and part of 3 tree groups will be removed.
7.3 The main area of impact in terms of tree loss will be around the entrance and
road infrastructure. The new access will cause a loss of screening and visual
amenity and a loss of habitat and green connectivity. A number of oak trees in
reasonable condition will also be removed across the centre of the site.
7.4 At the time of the survey some trees immediately adjacent to the site were
subject to Tree Preservation Orders. Further details can be found in Section 3.
7.5 Pruning works are recommended. These include the removal of dead wood or
trees for hazard abatement, and woodland thinning and improvement works. In
some areas, the retention of dead trees for conservation value is recommended.
7.6 Ten features were noted as having features of a size and condition desirable to
bats, including 5 woodland compartments. Any tree that has been identified as
having bat roost potential (Section 3.3) that will be affected by the
development proposal should be included in bat activity surveys.
7.7 Protective barrier fencing will be required to demarcate a Construction Exclusion
Zone (CEZ) around retained trees prior to the commencement of development.
Fencing alignment is shown on Drawing 2 and a specification on Drawing 3.
7.8 An Arboricultural Method Statement (AMS) will be required for works proposed
within the CEZ shown on Drawing 2. The AMS will detail special mitigation
construction and procedure that will minimise damage to tree roots and the
surrounding soil. The AMS should detail areas of hard and soft landscaping,
footpath and cycle track construction close to trees, and the design and
implementation of the ‘treetop play area’ in the south-west of the site.
7.9 It is the recommendation of this report that the loss of trees associated with the
development proposals will be adequately mitigated by the planting of 150 new
individual trees and 5.88ha of new woodland planting. New planting will result
in a substantial net increase in tree cover and associated positive effects.
Impacts to screening will be minimised by new woodland planting around the
site entrance. Particular benefits will be associated with the extension of an
existing wood, strengthening of boundary planting and increases in species and
age variation. An increase in arboreal habitats and environmental functions is
anticipated in the longer terms and an increase in public access to wooded
areas may have associated health and social benefits.
APPENDIX 1
ARBORICULTURAL DATA SHEETS
APPENDIX 1: Arboricultural Survey Data Sheets
Surveyor TP
Date 15th June 2011
Town Nottingham
Site M1 J26 Oxylane Village
Dwg Ref D2953.001
Ref Species Height Stem Dia.
No. of
stems/indiv
iduals
Crown
Spread
North
Crown
Spread
South
Crown
Spread
East
Crown
Spread
West
Height of
Lowest
Branch
Maturity ConditionComments on form, condition,
health and significant defects
BS5837
Tree
Quality
Assess.
Radius of
RPA guide
circle
BS5837
RPAManagement Recommendations
Estimated
Remaining
Contribution
(m) (mm)arising
below 1.5m(m) (m) (m) (m) (m)
Young,
Middle Age,
Mature,
Veteran
Good, Fair,
Poor
A,B,C,R
(1,2,3)(m) (m2)
Long, Medium,
Short
Trees
T1 Sycamore 9.0 850.0 2.0 3.0 2.0 3.0 2.0 2.0 Middle Age Poor Bifurcate tree; natural pollard; both
stems failed at 3m with regrowth
forming a canopy with lumpy form;
cracks and splits in stem but no
imminent hazard
C,1,3 8.5 227.0 Monitor biennially and repollard on
a 5-year cycle
Short
T2 Sycamore 16.0 800.0 2.0 5.0 7.0 6.0 6.0 3.0 Middle Age Fair Basally bifurcate tree with included
union but separate rooting; some
buttress and root damage from
grazing; prominent boundary tree
B,1 8.0 201.1 Medium
T3 Sycamore 17.0 2000.0 3.0 5.0 10.0 9.0 7.0 3.0 Mature Fair Large boundary tree; basally
trifurcate but with probable
separate rooting; fire damage
within rooting area; moderate stem
cavity and root severance; largest
tree in area
B,2 20.0 1256.6 Monitor annually Medium
T4 Ash 17.0 650.0 1.0 6.0 7.0 7.0 6.0 6.0 Middle Age Good Slightly twiggy crown; bifurcate at
5m; boundary tree
A,1,2 7.8 191.1 Long
T5 Sycamore 16.0 690.0 1.0 6.0 6.0 7.0 7.0 4.0 Middle Age Good Boundary tree; ivy-clad; fence
occlusions; no significant defects
B,1,2 8.3 215.4 Long
T6 Sycamore 16.0 540.0 1.0 2.0 5.0 5.0 7.0 4.0 Middle Age Good Boundary tree; fence occlusions;
no significant defects
B,1,2 6.5 131.9 Long
T7 Ash 18.0 530.0 1.0 6.0 4.0 8.0 6.0 3.0 Middle Age Good Adjacent to clearing; internal stem
crack; good form; minor
asymmetry
A,1,2 6.4 127.1 Long
T8 Sycamore 17.0 700.0 2.0 7.0 7.0 12.0 7.0 2.0 Middle Age Fair Major bifurcation failure at 1m;
meaning asymmetrical tree with
broken stem still growing on the
ground; good habitat
B,3 7.0 153.9 Medium
T9 Ash 16.0 560.0 1.0 6.0 6.0 6.0 6.0 5.0 Middle Age Fair Minor stem cracking and bacterial
ooze; reduced crown density
B,1,2 6.7 141.9 Monitor annually Long
T10 Beech 16.0 650.0 1.0 6.0 6.0 7.0 6.0 3.0 Middle Age Good Good form and balanced crown;
2.5m from fence
A,1,2 7.8 191.1 Long
T11 Beech 17.0 1010.0 1.0 8.0 8.0 8.0 8.0 2.0 Middle Age Fair Major cavity with animal holes in
dead wood; bat potential; internal
adventitious roots; some foliage
browning possibly due to recent
dry weather
A,1,2,3 12.1 461.5 Long
T11 Sycamore 16.0 2000.0 6.0 9.0 6.0 9.0 9.0 3.0 Mature Good Large tree, multistemmed from
base; possibly an old lapsed
coppice stool; unusual form with
high interest value; balanced
crown; no obvious major cavities
and some dead wood
A,1 20.0 1256.6 Remove dead wood and detritus
from within stem union to allow for
better inspection of condition
Long
TEP Ref: X2953.001 1 of 4 June 2011
APPENDIX 1: Arboricultural Survey Data Sheets
Ref Species Height Stem Dia.
No. of
stems/indiv
iduals
Crown
Spread
North
Crown
Spread
South
Crown
Spread
East
Crown
Spread
West
Height of
Lowest
Branch
Maturity ConditionComments on form, condition,
health and significant defects
BS5837
Tree
Quality
Assess.
Radius of
RPA guide
circle
BS5837
RPAManagement Recommendations
Estimated
Remaining
Contribution
(m) (mm)arising
below 1.5m(m) (m) (m) (m) (m)
Young,
Middle Age,
Mature,
Veteran
Good, Fair,
Poor
A,B,C,R
(1,2,3)(m) (m2)
Long, Medium,
Short
T12 Ash 17.0 560.0 1.0 5.0 5.0 5.0 5.0 4.0 Middle Age Good Boundary tree with fence
occlusions; breaks the
surrounding canopy
A,1,2 6.7 141.9 Long
T13 Ash 17.0 900.0 3.0 3.0 7.0 5.0 7.0 4.0 Middle Age Good Basally bifurcate; minor cavities;
fence occlusion; good union;
boundary tree
B,1,2 9.0 254.5 Long
T14 Ash 16.0 520.0 1.0 3.0 6.0 7.0 5.0 3.0 Middle Age Good Boundary tree; fence occlusions;
some exposed buttresses and
compaction
B,1,2 6.2 122.3 Remove dead branch; crown raise Long
T15 Ash 18.0 780.0 1.0 10.0 8.0 11.0 8.0 3.0 Middle Age Good First tree in group/line; some
dieback of tips; typical form and
condition for species
A,1,2 9.4 275.2 Remove dead branch and tips if
close to proposed rope course
Long
T16 Oak 17.0 840.0 1.0 4.0 5.0 10.0 7.0 4.0 Middle Age Fair Stem wounds and browsing by
cattle and associated compaction;
dense; asymmetrical crown with
some dead wood; old failures;
large wounds on low branches
B,2 10.1 319.2 Reduce low branch; mulch area
and alleviate compaction
Long
T17 Oak 12.0 450.0 1.0 5.0 4.0 5.0 5.0 2.0 Middle Age Poor Dead tree R n/a n/a Reduce to habitat pole and
monitor annually within play area
Short
T18 Ash 16.0 630.0 1.0 6.0 6.0 7.0 6.0 3.0 Middle Age Fair Root damage and compaction;
bifurcate at 1m; prominent tree in
better condition than many
adjacent trees; minor dead wood;
no significant defects
B,1,2 7.6 179.6 Mulch area to alleviate compaction Long
T19 Sycamore 9.0 350.0 1.0 2.0 3.0 4.0 3.0 2.0 Middle Age Fair Cattle damage and browsed
epicormic growth; small dense
crown; some scale insect and
pruning wounds
B,2 4.2 55.4 Mulch area to alleviate compaction Medium
T20 Sycamore 10.0 570.0 1.0 5.0 5.0 6.0 5.0 3.0 Middle Age Fair Tight bifurcation at 2m; lean to
east (20 degrees approx.); cattle
damage
B,2 6.8 147.0 Mulch area to alleviate compaction Medium
T21 Oak 9.0 570.0 1.0 4.0 4.0 4.0 6.0 2.0 Middle Age Fair Minor dead wood; cattle damage
and compaction
B,2 6.8 147.0 Mulch area to alleviate
compaction; deadwood
Long
T22 Sycamore 10.0 2000.0 7.0 6.0 6.0 6.0 6.0 2.0 Middle Age Poor Dead multistemmed tree R n/a n/a Reduce to a single stem for habitat
and monitor annually
Short
T23 Ash 14.0 690.0 1.0 5.0 5.0 5.0 5.0 3.0 Middle Age Fair Bifurcate at 1.5m; buttress
damage; reduced crown density;
compaction within root area; some
wounds and dead wood
B,2 8.3 215.4 Mulch area to alleviate compaction Medium
T24 Sycamore 11.0 660.0 2.0 5.0 7.0 5.0 5.0 4.0 Middle Age Fair Bifurcate healthy crown; cattle
damage to roots and soil
B,2 6.6 136.8 Mulch area to alleviate compaction Medium
T25 Sycamore 12.0 720.0 1.0 7.0 8.0 7.0 7.0 4.0 Middle Age Poor Ring-barked and decaying at
base; dieback; shotgun wounds
R n/a n/a Remove tree and replant Short
T26 Sycamore 12.0 680.0 1.0 8.0 3.0 9.0 7.0 4.0 Middle Age Good Leaning tree with basal cavity;
asymmetric crown form
B,1,2 8.2 209.2 Mulch area to alleviate compaction Medium
T27 Sycamore 11.0 570.0 1.0 5.0 5.0 7.0 4.0 2.0 Middle Age Poor Advanced decline; poor leaf flush;
cattle damage
R n/a n/a Remove tree and replant Short
T28 Oak 10.0 650.0 1.0 9.0 7.0 7.0 7.0 3.0 Middle Age Good Cattle damage; minor dead wood;
broad form; better condition than
surrounding trees
A,1,2 7.8 191.1 Long
T29 Oak 13.0 840.0 1.0 10.0 8.0 7.0 8.0 2.0 Middle Age Fair Minor cavities at 2m; basal failure;
moderate dead wood; leaf
yellowing; compaction associated
with track
B,1,2 10.1 319.2 Deadwood Long
TEP Ref: X2953.001 2 of 4 June 2011
APPENDIX 1: Arboricultural Survey Data Sheets
Ref Species Height Stem Dia.
No. of
stems/indiv
iduals
Crown
Spread
North
Crown
Spread
South
Crown
Spread
East
Crown
Spread
West
Height of
Lowest
Branch
Maturity ConditionComments on form, condition,
health and significant defects
BS5837
Tree
Quality
Assess.
Radius of
RPA guide
circle
BS5837
RPAManagement Recommendations
Estimated
Remaining
Contribution
(m) (mm)arising
below 1.5m(m) (m) (m) (m) (m)
Young,
Middle Age,
Mature,
Veteran
Good, Fair,
Poor
A,B,C,R
(1,2,3)(m) (m2)
Long, Medium,
Short
T30 Oak 12.0 720.0 1.0 7.0 7.0 7.0 7.0 5.0 Middle Age Poor Major dead wood; chorosis; low
vigour; basal cavity; cattle damage
C,2 8.6 234.5 Deadwood tree, protect roots
during development and monitor
recovery, mulch area
Medium
T31 Oak 12.0 720.0 1.0 7.0 7.0 7.0 7.0 4.0 Middle Age Fair Moderate dead wood; cattle
compaction; end tree of linear
group
B,1,2 8.6 234.5 Deadwood Long
T32 Sycamore 11.0 500.0 2.0 3.0 3.0 3.0 3.0 2.0 Middle Age Poor Dead birfurcate tree R n/a n/a Remove tree and replant Short
T33 Ash 14.0 620.0 2.0 5.0 5.0 5.0 4.0 2.0 Middle Age Poor Canker and bacterial ooze;
bifurcate at 0.5m with poor union
form; reasonable crown condition
C,1,2 6.2 120.8 Monitor annually Medium
Groups
G1 Hawthorn; elder;
holly
6.0 250.0 10+ 1.0 Middle Age Good Hedge by track along boundary;
good feature for potential 'green
lane' within development; old
boundary feature with sunken
adjacent lane leading down to
underpass
B,2,3 See
Drawing
D2953.00
1
Interplant to reinforce and restore
feature and protect to 4m from
stems; crown lift over green lane
Long
G2 Beech; hawthorn;
birch; ash
16.0 450.0 10+ 1.0 Middle Age Good Bank planting with old hedgerow
boundary trees; slender woodland
form; some detritus around layby;
mainly beech monoculture with
some variety in localised areas
A,2 See
Drawing
D2953.00
1
Planting to increase species
diversity; 15% selective thinning;
crown lift over green lane
Long
G3 Hawthorn 5.0 250.0 10+ 1.0 Middle Age Good Small bank trees by underpass C,1,3 See
Drawing
D2953.00
1
Additional planting in surrounding
area to stabilise bank
Long
G4 Elm; elder; ash;
sycamore
17.0 700.0 10+ 1.0 Young to
Middle Age
Fair Dense natural area with many
small dead elms and dense
brambles/nettles; some larger
sycamore to interior; larger
clearing to west of group; high
wildlife value
B,1,2,3 See
Drawing
D2953.00
1
Remove dead trees within falling
distance of the boundary
Long
G5 Common lime 16.0 500.0 10+ 1.0 Middle Age Good Cluster of stems in woodland W1;
epicormic growth; two of three
trees; adjacent to clearing with
dense ferns
B,1,2,3 See
Drawing
D2953.00
1
Long
G6 Ash 18.0 520.0 10+ 3.0 Middle Age Good Stand within boundary woods;
close spacing; ivy; some slender
and asymmetrical form towards
the site interior
A,1,2 See
Drawing
D2953.00
1
Long
G7 Hawthorn 5.0 200.0 10+ 1.0 Middle Age Fair Odd small boundary trees; some
grazing damage
C,1 See
Drawing
D2953.00
1
Infill planting and planting to
extend group for improved
screening and to connect new
swale to woodland compartments
Long
G8 Hawthorn; wych
elm; oak
6.0 200.0 10+ 1.0 Mature Fair Boundary planting belt and scrub;
good screening
C,1 See
Drawing
D2953.00
1
Long
G9 Beech; elm;
sycmore;
hawthorn; ash
15.0 600.0 10+ 1.0 Young to
Middle Age
Fair Planting by motorway; some
drought stress; larger sycamore to
northern end, 1m from boundary;
dense
A,2 See
Drawing
D2953.00
1
Infill planting and planting to
extend group
Long
TEP Ref: X2953.001 3 of 4 June 2011
APPENDIX 1: Arboricultural Survey Data Sheets
Ref Species Height Stem Dia.
No. of
stems/indiv
iduals
Crown
Spread
North
Crown
Spread
South
Crown
Spread
East
Crown
Spread
West
Height of
Lowest
Branch
Maturity ConditionComments on form, condition,
health and significant defects
BS5837
Tree
Quality
Assess.
Radius of
RPA guide
circle
BS5837
RPAManagement Recommendations
Estimated
Remaining
Contribution
(m) (mm)arising
below 1.5m(m) (m) (m) (m) (m)
Young,
Middle Age,
Mature,
Veteran
Good, Fair,
Poor
A,B,C,R
(1,2,3)(m) (m2)
Long, Medium,
Short
G10 Hawthorn; elder;
ash; wych elm
7.0 250.0 10+ 1.0 Middle Age Good Boundary hedge/belt of trees;
dense, valuable screening and
wildlife corridor
B,2,3 See
Drawing
D2953.00
1
Widen by 2m and remove dead
trees
Long
G11 Ash; oak 16.0 540.0 27.0 2.0 Middle Age Fair Broadly linear group of similarly
aged and sized trees with one oak;
some stem leaning and
asymmetrical form; many stem
wounds and browsing damage
from cattle with associated
cavities; cattle compaction; some
multistemmed form; rubble in area
B,2 See
Drawing
D2953.00
1
Mulch area to alleviate
compaction; remove damaged
stems where they are close to
targets within the development
Long
G12 Ash; sycmore 15.0 1000.0 12.0 2.0 Middle Age Fair One sycamore; many wounds and
cavities; some lost or removed
stems; cattle dcamage; landscape
value; old boundary feature
B,2 See
Drawing
D2953.00
1
Mulch area to alleviate compaction Long
Woods
W1 Sycamore;
hawthorn; elm;
elder; ash
17.0 750.0 10+ 1.0 Middle Age to
Mature
Good Woodland area; almost entirely
sycamore; wild garlic abundant;
nests; attractive backdrop to site
and buffer planting; some old
hawthorn on edge of group with
interesting mature form; very
prominent feature
A,2 See
Drawing
D2953.00
1
Improve species mix by a
combination of thinning and
replanting; cyclical biennial
inspection of boundary trees;
protect at 7m from stems
Long
W2 Hawthorn; elder;
sycamore; ash;
sych elm; oak
12.0 400.0 10+ 1.0 Middle Age to
Mature
Good Strong boundary line of hawthorn
adjacent to woodland area;
developing woodland with good
subcanopy species mix but fewer
large trees than surrounding
woodland areas
A,2,3 See
Drawing
D2953.00
1
Selective thinning to create space
around potential climax trees;
removal of one hawthorn witth
union failure; protect to 4m from
boundary
Long
W3 Oak; hawthorn;
sycamore; elder;
beech; ash; wych
elm; larch
17.0 880.0 10+ 1.0 Middle Age to
Mature
Good Continuation of W2 but with an
increased number of larger
standard trees and therefore more
open at ground level; very high
value feature; mature hawthorn
along boundary
A,1,2,3 See
Drawing
D2953.00
1
Long
W4 Hawthorn; elder;
wych elm; cherry;
hazel; oak;
sycamore; rose;
holly
12.0 350.0 10+ 1.0 Middle Age Good Dense scrubby woodland with
boundary line of hawthorn trees;
good species mix; some dead
elms; good bird nesting potential
A,1,2,3 See
Drawing
D2953.00
1
Remove dead elms and hawthorn
near to boundary
Long
W5 Ash; sycamore;
hawthorn; elder
18.0 800.0 10+ 1.0 Young to
Middle Age
Good Woodland belt with good age
structure; minor browsing damage;
most trees around 450mm stem
diameter along boundary edge
A,1,2,3 See
Drawing
D2953.00
1
Tidy up failed ash tree and fell
supporting tree with partial
rootplate failure
Long
W6 Ash; wych elm;
hawthorn; oak;
sycamore; yew;
elder; hazel; elm;
field maple
17.0 600.0 10+ 1.0 Middle Age Good Good species mix with some elm
regen from old stumps; valuable
screening from motorway; good
structure; ash is the main canopy
species
A,1,2,3 See
Drawing
D2953.00
1
Remove dead and dying elms by
boundary; extend group along the
eastern boundary
Long
TEP Ref: X2953.001 4 of 4 June 2011
APPENDIX 2
SURVEY METHODOLOGY
APPENDIX 2: ARBORICULTURE SURVEY METHOD
Revision D TEP, Genesis Centre, Birchwood Science Park, Warrington, WA3 7BH
Arboricultural surveys are conducted from ground level only. The nature of the soils on site is not assessed during the survey. The possibility of minor soil movement due to the root activity of the trees cannot be discounted; therefore, the advice of a structural engineer should be sought with regard to appropriate foundation depths. Trees are dynamic living organisms with a constantly changing structure; even trees in good condition can suffer from damage or stress. Regular annual or bi-annual inspections by a qualified arboriculturalist can help to identify potential problems before they become acute. The following features of each tree, group of trees or wood may have been recorded in the Arboricultural Data Sheets (Appendix One). Species The common name is given. The Latin name may also be given if further clarification is required. Height Top height of tree recorded in metres. Stem Diameter For single-stemmed trees the measurement is taken at 1.5 metres above ground level and recorded in
millimetres. For multi-stemmed trees the measurement is taken directly above the root flare in millimetres. For tree groups the measurement is taken in the same way as with single-stemmed trees and is recorded in millimetres as a range from minimum to maximum diameters.
No. of Stems A count of stems arising below a height of 1.5m. Crown Spread The N, S, E and W branch spreads are recorded in metres to provide a representative crown shape. Height of Lowest Branch Crown clearance above ground level recorded in metres. Tree Age Young Trees than can reasonably be relocated or replaced like for like, without undue cost; Middle Age Trees in the established growth stage of their life with the potential to continue increasing in size; Mature Trees that have reached their ultimate size, given their location and surroundings; Veteran A tree recognised by features of a biological, cultural or aesthetic value that are
characteristic of, but not exclusive to, individuals surviving beyond the typical age range for the species concerned.
Condition An overall assessment of a tree’s physiological and structural state in which factors that may increase its susceptibility to the effects of development are taken into account. Comments A brief evaluation and description of the tree with comments on the form, vitality, health and any significant defects that may be present. Trees are surveyed without reference to any proposed development. The implications of any development are discussed in the Arboricultural Implication Assessment. Tree Quality Assessment The tree quality assessment is based on Table 1 of BS 5837:2005 (See below). Four categories (A, B, C and R) are used to denote tree quality (A= High, B = Moderate, C = Low, R= Unsuitable for retention). Subcategories (1-3) denote the specific function value of the trees and the reasoning behind the assessment (the subcategories may be used in combination but do not accumulate collective weight). BS 5837 Root Protection Area (RPA) The Root Protection Area (RPA) is allocated to ensure that a sufficient area is left undisturbed during development to prevent direct and indirect damage to tree roots and the soil structure. The RPA is calculated using a mathematical equation included in BS 5837:2005 (Table 2) and is based on a trees stem diameter. In some cases the RPA may need to be adapted to ensure survival based on criteria such as the tree’s condition, species and crown spread. Any alteration should be justifiable but is made at the arboriculturists discretion. The surrounding RPA should remain undisturbed and be treated as a sacrosanct Construction Exclusion Zone (CEZ) until development completion and removal is approved by an arboriculturist.
APPENDIX 2: ARBORICULTURE SURVEY METHOD
Revision D TEP, Genesis Centre, Birchwood Science Park, Warrington, WA3 7BH
Recommendations Recommendations for arboricultural works, etc. are based on the current land use, and take into account the tree or group attributes without bias to the proposed development. Estimated Remaining Contribution An estimation of the trees useful life expectancy. Long > 40 years Medium 20 – 40 years Short 10 – 20 years Very Short < 10 years
British Standards Institute 2005, p.6 NOTE: All young trees are assessed as category ‘C’ quality but this does not preclude their retention within a development; all retention and removal recommendations will be detailed within the Arboricultural Implications Assessment report.
DRAWING 1
TREE CONSTRAINTS PLAN
S
P
O
I
L
S
O
F
E
A
R
T
H
T3
T4
T5
T6
T7
T8
T33
T9
T10
T11
T12
T13
T14
T15
T16
T32
T28
T29
T30
T31
T24
T25
T26
T27
T23
T18
T19
T20
T21
T22
T17
G1
G3
G10
G2
G4
W1
W1
W2
W3
G11
G12
W4
G6
W5
W6
W6
G8
G9
G7 (occasional individuals along boundary)
G5
T1
T2
Trees subject to Tree Preservation Order protection
NOTE:
Some individual tree stems were not shown on the
provided topographical survey drawing. Tree locations
should therefore be considered to be approximate.
All groups and woodlands that are adjacent to the site
are owned by third parties and must be retained unless
otherwise specified.
Trees on boundaries are jointly owned by both
landowners and must not be removed without mutual
consent.
Categories based on BS 5837: 2005
A Category Trees/Groups
High value features
B Category Trees/Groups
Moderate value features
C Category Trees/Groups
Low value features
R Category Trees/Groups
Features unsuitable for retention
Root Protection Area
To inform masterplanning
Drawing Key
Approximate Survey Boundary
Drwg No
Drawn
Scale
TP RO
1:1500 @ A1
D2953.001
Checked
Title
Tree Constraints Plan
Oxylane Village, Decathlon
M1 J26
JS
16/06/11
Approved
Date
Genesis Centre
Birchwood Science Park Warrington
WA3 7BH
Tel 01925 844004
Fax 01925 844002
e-mail [email protected]
Project
Description
Reproduced by permission of Ordnance Survey on behalf of Her Majesty's
Stationery Office.
© Crown Copyright and database right 2010. All rights reserved.
Rev Drawn Approved Date
DRAWING 2
ARBORICULTURAL IMPLICATIONS AND TREE PROTECTION PLAN
M
1
Tra
ck
A Category Trees/Groups
High value features
B Category Trees/Groups
Moderate value features
C Category Trees/Groups
Low value features
R Category Trees/Groups
For retention as 'conservation stumps'
Drawing Key
NOTE:
Some individual tree stems were not shown on the provided
topographical survey drawing. Tree locations should therefore
be considered to be approximate.
All groups and woodlands that are adjacent to the site are
owned by third parties and must be retained unless otherwise
specified.
Trees on boundaries are jointly owned by both landowners and
must not be removed without mutual consent.
Categories based on BS 5837: 2005
A Category Trees/Groups
High value features for removal
B Category Trees/Groups
Moderate value features for removal
C Category Trees/Groups
Low value features for removal
R Category Trees/Groups
Features unsuitable for retention
Special Construction Required
Detailed in Arboricultural Method Statement
Tree Protection Fencing
Drwg No
Drawn
Scale
TP RO
1:1500 @ A1
D2953.003
Checked
Title
Arboricultural Implications and Tree
Protection Plan
Oxylane Village, Decathlon
M1 J26
JS
11/07/11
Approved
Date
Genesis Centre
Birchwood Science Park Warrington
WA3 7BH
Tel 01925 844004
Fax 01925 844002
e-mail [email protected]
Project
Description
Reproduced by permission of Ordnance Survey on behalf of Her Majesty's
Stationery Office.
© Crown Copyright and database right 2010. All rights reserved.
Rev Drawn Approved Date
A Updated layout TP RR 20/08/12
B Updated layout TP JG 12/09/13
DRAWING 3
RECOMMENDED PROTECTIVE FENCING